
| APR | MAY | JUN | JUL | AUG | SEP | |||||||||||||||||||||
| Week no. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| Site | ||||||||||||||||||||||||||
| Small Skipper | . | . | . | . | . | . | . | . | . | 1 | . | 40 | 28 | 9 | 6 | 6 | 5 | . | ||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | ||||||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 1 | 1 | ||||||||
| Large Skipper | . | . | . | . | . | 1 | . | . | 2 | . | 17 | 8 | . | . | . | . | . | . | ||||||||
| Dingy Skipper | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | . | . | . | 7 | 3 | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 1 | 1 | 8 | 6 | . | 2 | . | 1 | . | . | . | . | . | . | 3 | 18 | 2 | 3 | ||||||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | 11 | . | 1 | 6 | 8 | 3 | ||||||||
| Green-veined White | . | . | 2 | 3 | . | . | . | 3 | . | . | . | 5 | . | 14 | 10 | 18 | . | 1 | ||||||||
| Orange Tip | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | . | . | . | 5 | . | . | . | . | . | . | . | . | 1 | 5 | . | 2 | . | . | ||||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | ||||||||
| Common Blue | . | . | . | . | 2 | 5 | 3 | 11 | 6 | 2 | 2 | 2 | . | . | 1 | 1 | 9 | 8 | ||||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 4 | 8 | ||||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | 2 | . | . | 1 | 5 | 2 | 4 | 4 | 3 | . | . | ||||||||
| Peacock | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 7 | 2 | . | ||||||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | . | . | ||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 3 | 4 | 2 | . | . | . | . | . | ||||||||
| Speckled Wood | . | . | . | . | . | . | . | 1 | 3 | 1 | . | . | 1 | 1 | 1 | 1 | . | . | ||||||||
| Wall Brown | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 5 | . | 1 | 1 | ||||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 4 | 22 | 26 | 18 | 13 | . | 2 | 1 | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 5 | 5 | 5 | . | 4 | 4 | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | 1 | . | 50 | 96 | 97 | 62 | 95 | 67 | 50 | 31 | 11 | 11 | ||||||||
| Small Heath | . | . | . | 1 | 5 | . | 4 | 15 | 27 | 11 | 20 | 22 | 16 | . | 2 | 7 | . | 1 | ||||||||
| Ringlet | . | . | . | . | . | . | . | . | . | 1 | 1 | 44 | . | . | 7 | 3 | 4 | 2 | ||||||||